Description
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to 3.17.2, Oj::Doc iterators (each_value, each_child, each_leaf) were vulnerable to a heap use-after-free. When a Ruby block yielded during iteration calls doc.close or d.close, the document's heap memory is freed while the C iterator is still running. When control returns from the block, the iterator reads from the freed region, producing a use-after-free accessible from pure Ruby. This issue has been fixed in version 3.17.2.
Analysis and contextual insights are available on OpenCVE Cloud.
Remediation
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-9ppp-w3g4-fh4q | Oj: Use-After-Free in Oj::Doc Iterators via Reentrant Close |
References
History
Tue, 30 Jun 2026 23:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. Prior to 3.17.2, Oj::Doc iterators (each_value, each_child, each_leaf) were vulnerable to a heap use-after-free. When a Ruby block yielded during iteration calls doc.close or d.close, the document's heap memory is freed while the C iterator is still running. When control returns from the block, the iterator reads from the freed region, producing a use-after-free accessible from pure Ruby. This issue has been fixed in version 3.17.2. | |
| Title | Oj : Use-After-Free in Oj::Doc Iterators via Reentrant Close | |
| Weaknesses | CWE-416 | |
| References |
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| Metrics |
cvssV4_0
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Subscriptions
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-30T23:22:43.648Z
Reserved: 2026-06-16T13:49:33.555Z
Link: CVE-2026-54897
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OpenCVE Enrichment
Updated: 2026-07-01T01:00:14Z
Weaknesses
Github GHSA